Shaft-clamp.



PATENTED FEB. 28, 1905.

H. G. SWAN. SHAFT CLAMP.

APPLICATION FILED NOV. 19,1904.

' INVENTOR r/vif. ,ww @a alu/wr /M a WITNESSES f @7 7 M /AM/ llnrrhnMarlee Patented February 98, 1905.

f airienir ff l l llfi SPiIMF TF CLAMWII SPECIFICATION forming part ofLetters Patent No. 783,909, dated February 28,1905.

Application filed November 19, 1904:. Serial No. 233,4:25.

To a, 1071,0170 it TIMI/j] concern/.-

Be it known that l, HENRY C. SWAN, of Cleveland, Cuyahoga county, Ohio,have invented a new and useful Shaft-Clamp, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings, forming part of this specilication, in whiclr-Figure 1 is a sectional side elevation of my improved clamp in position,and Fig. 2 is a top plan view of the same.

My invention relates to the devices employed for clamping or securing anarm or lever to a shaft, and more particularly to the type wherein theshaft extends through an oblong hole in the lever and a dog is employedfor gripping the shaft and forcing it friction ally into contact withthe surrounding socket.

The object of the invention is to provide a new and improved arrangementof the dog and adjusting device whereby it may be quickly and firmlysecured and easily detached from the shaft.

In the drawings, L- represents the lever or crank-arm, 3 the shaft, and4, the grippingdog. The shaft 3 extends through a box-like portion atthe end of the lever formed by the side pieces or forks 5 5 and therounded outer wall 6. The holes through the side plates are oblong, andthe top of the casing or box portion is cut away to receive the swingingdog. The rear end of this dog is preferably rounded and fits within apocket '7 in the rear end of the box or casing, so as to tilt in thispocket. The dog is preferably provided with serrated teeth 8 and isadjusted by means of a bolt 9, which extends through a hole in thebottom of the casing and through a flared hole in the dog. The top ofthe dog is preferably rounded -or shaped to provide a proper face forreceiving the pressure of the nut 10.

In using the device the shaft is slipped through the oblong holes, thedog is dropped l down, and. its teeth are then firmly forced against theshaft by turning the nut 10. The shaft is thus forced into lirm contactwith the inner cylindrical surface of the outer wall and securelyclamped.

The advantages of my invention result from the simplicity and ease ofthe operation of the device-and from its efficient clamping action.

The dog is preferably made of steel, while the lever maybe made of amalleable casting.

Many changes may be made in the form and arrangement of the partswithout departing from my invention.

1. in a shaft-clamp, an arm having perforated forks with an outerpocket, a pivoted. dog between the forks and having an end portionarranged to grip a cylindric; vl shaft, and a bolt device arranged todraw the dog to place; substantially as described.

2. in a shaft-clamp, a lever having a hole for the shaft, a dogi'nounted on the lever and having an end portion arranged to grip acylindrical shaft, and an adjusting device arranged to force the doginto contact with the shaft; substantially as described.

3. In a shaft-clamp, a lever having an outer casing portion, with acylindrical outer wall arranged to [it the shaft, a dog pivoted betweenthe sides of the casing and having an end portion arranged to grip acylindrical shaft, and a screwbolt extending through the casing and thedog; substantially as described.

4:. .ln a shaft-clamp,alever havingan outer casing or box portion withperforated sides and a cylindrical outer wall, a (log arranged to swingbetween the sides of the casing and through the top and having an endportion arranged to grip a cylindrical shaft, and a screw-bolt extendingthrough the bottom of the casing and through the dog; substantially asdescribed.

in testimony whereof I have hereunto set my hand.

HENRY O. SWAN.

Witnesses:

Emon W. liivrn, EMIL N. J A rr n.

